Platen printing-press.



PATENTED MAY zs, 1905.

M. ROCKSTBOH.

PLATBN PRINTING PRESS.

APPLICATION FILED JUNE 28,1904

3 SHEETS-SHEET 1.

No. 790,755. PATENTED MAY 23, 1905.

- M. ROGKSTROH.

PLATBN PRINTING PRESS.

APPLIOATION FILED JUNE 28,1904

3 SHEETS-SHEET 2.

Zfldp zzawas, #Ziz 05/2 $02 pzzwfiaClifi/fi'aia We I I I W/M/ No. 790,755. PATENTED MAY 23, 1905.

M. ROGKSTBOH. PLATEN PRINTING PRESS.

APPLICATION FILED JUNE 28,1904

3 SHEETS-SHEET 3.

UNITED STATES Patented May 23, 1905.

PATENT" OFFICE.

PLATEN PRINTING-PRESS.

SPECIFICATION forming part of Letters Patent N0. 790,'i 55, dated May 23, 1905.

Application filed June 28, 1904. Serial No. 214,532.

fication.

This invention relates to a further development and improvement on the apparatus described in the specification of my application for patent, filed December 3, 1901, Serial No.

84,574, for simultaneously disengaging all the inking and distributing rollers from the inking-cylinders of platen printing-presses; and it has for its main object to remedy a serious drawback of the above-mentioned apparatus, which consists in that in returning the inking and distributing rollers into their operative positionsthat is to say, in the downward movement of the sliding piecethe springbolts of the distributing-rollers slip off the inclined surfaces in an abrupt and violent manner, and thus produce disagreeable and injurious shocks.

A further object of the present invention is to utilize the upward and downward movements of the sliding pieces to effect the disengagement of the vibrator-roller from the ductor-roller and from the first distributingroller simultaneously.

For the purpose of preventing shocks in the downward movement of the sliding pieces a twofold movement is imparted to these that is to say, whereas in the apparatus according to the aforesaid application the sliding pieces had merely an upward and a downward movement they now according to the present invention have a lateral movement simultaneously therewith. The consequence of thisis that the inclined surfaces can be dispensed with and the smooth edges of the sliding pieces act directly on the spring-bolts of the distributing-rollers and in their return release the spring-bolts in a gradual and uniform manner, so that shocks cannot occur.

A further improvement according to the present invention consists in that the parts engaging with the under sides of the journals of the distributing-rollers are no longer constructed as rotatable levers, but are now rigidly connected to the sliding piece.

In the accompanying drawings, Figure 1 is a side elevation of so much of the press as is necessary to illustrate the present invention, wherein the inking, distributing, and vibrator rollers are shown in their engaged or operative positions. Fig. 2 isa front elevation of one side of the press, and Fig. 3 is a side elevation wherein the rollers are shown in their disengaged or inoperative positions.

1 and 2 are the inking-cylinders of the press. 1

3 4 5 6 are the inking-rollers, mounted in sliding bearings 13, that are provided with rearward extensions in the form of springbolts 14. I

7 8 9 1O 11 are the distributing-rollers, mounted in bearings 19, that are adjustable in vertical slots 17 18.

On both sides of the press are the sliding pieces 15, (only one is shown,) which engage, by means of obliquely and upwardly extending slots 38, with pins 39 on the framing of the press. On the rear edge of the sliding piece are arms or shoulders 20, which extend under the journals of the distributing-rollers 7 8 9 1O 11 and which when the sliding piece is raised by the hand operable handle 16 lift the distributing-rollers away from the inking-cylinders 1 and 2 and also move them out of mutual contact. The forward edge of the sliding piece 15 is smooth.

On an axle 40, which is mounted in a suitable manner in the framing of the press, there are mounted so as to rock thereon on both sides two-armed levers 24, one arm of which engages, by means of a slot 25, with a pin 26 on the sliding piece 15, and the other arm carries a fork 27. The vibrator 28 is mounted in the well-known manner in arms 30, which are adapted to rock on the axle 29 and on which is fixed a support 31 for an antifriction-roller 32, that works on the cam-disk 33 and serves to bring the vibrator-roller 28 into contact with the ductor 34 and the first distributingroller 11 alternately. The support 31 also carries an arm 35, which is provided with a pin 36.

37 is the ink box or duct for the ductor 34:.

The operation of the apparatus is as follows: The rise and fall of the sliding pieces are effected by means of the handle 16, which is pivoted at 21 in the framing of the press and which engages, by means of a crank-pin 22, in a slot in the shoulder 23 of the sliding piece. When the lever is moved by hand in the direction indicated by the arrow in Fig. 1 into the position shown in Fig. 3, the sliding pieces are caused to execute a rising movement toward the right hand. In this movement the arms carry the axles 19 of the distributing-rollers 7 8 9 1O 11 with them and move them out of contact with one another and with the inking-cylinders 1 and 2. At the same time the smooth edges of the sliding pieces bear against the free rear ends of the spring-bolts 14 and push these, together with the bearings 13, into the position shown in Fig. 3, so that the inking-rollers 3 4 5 6 come out of contact with the inking-cylinders 1 and 2. When the lever 16 is moved back into the position shown in Fig. 1, the sliding pieces move gradually out of their top right-hand position into their bottom left-hand position, While the bolts 14 remain in contact with the smooth edges of the sliding pieces, so that a violent return of the bolts 14 cannot occur. On rotating the hand-lever 16 from its position shown in Fig. 1 into its position shown in Fig. 3 the two-armed lever 24 is at the same time rotated on its axle in the direction indicated by the arrow shown in Fig. 1, so that the fork 27 engages with the pin 36 of the arm 35 and moves the vibrator 28 into the position shown in Fig. 3, in which it is not in contact with either the ductor 34 or the first distributing-roller 11. WVhen the-sliding pieces 15 are lowered again by the return movement of the lever 16, the fork 27 releases the pin 36, so that the roller 32 can now follow the movements of the cam 33 and can bring the vibrator-roller into contact with the ductor 34 and the first distributing-roller 11 alternately.

Having now particularly described and ascertained the nature of the said invention and in what manner the same is to be performed, I declare that What I claim is 1. In a printing-press having inking-cylinders, inking, ink-distributing and vibratory rollers, means for moving the inking, ink-distributing and vibratory rollers out of operative relation with respect to inking-cylinders, said means comprising a pair of shiftable elements having a simultaneous vertical and lateral movement and adapted to engage with said inking, ink-distributing and vibratory rollers and move them out of operative position when said elements are shifted.

2. In a printing-press having inking-cylinders, inking, ink-distributing and Vibratory rollers, means for moving the inking, ink-distributing and vibratory rollers out of operative relation with respect to the inking-cylinders, a pair of slotted shiftable elements having a simultaneous vertical and lateral movement, and further provided with extensions adapted to engage the ink-distributing rollers to move the same out of operative position when the elements are shifted, combined with a lever mechanism operated by said elements for moving the vibratory rollers.

3. In a printing-press having inking-cylinders, inking, ink-distributing and vibratory rollers, means formoving the inking, ink-distributing and vibratory rollers out of operative relation with respect to the inking-cylinders, a pair of slotted shiftable elements having a simultaneous vertical and lateral movement, and further provided with extensions adapted to engage the ink-distributing rollers to move the same out of operative position when the elements are shifted, combined with a lever mechanism operated by said elements for moving the vibratory rollers, and slidable bearings having rearwardly-extending springbolts for supporting the inking-rollers and adapted to be engaged by the shiftable elements so as to move the saidrollers out of operative relation with respect to the inkingcylinders.

In witness whereof I have hereunto set my hand in presence of two witnesses.

MAX ROGKSTROH.

Witnesses:

PAUL E. SOHILLING, PAUL ARRAs. 

